20196049 has 2 divisors, whose sum is σ = 20196050. Its totient is φ = 20196048.

The previous prime is 20195971. The next prime is 20196083. The reversal of 20196049 is 94069102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19421649 + 774400 = 4407^2 + 880^2 .

It is a cyclic number.

It is not a de Polignac number, because 20196049 - 2¹⁷ = 20064977 is a prime.

It is equal to p_1282279 and since 20196049 and 1282279 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20196049.

It is not a weakly prime, because it can be changed into another prime (20196089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10098024 + 10098025.

It is an arithmetic number, because the mean of its divisors is an integer number (10098025).

Almost surely, 2^20196049 is an apocalyptic number.

It is an amenable number.

20196049 is a deficient number, since it is larger than the sum of its proper divisors (1).

20196049 is an equidigital number, since it uses as much as digits as its factorization.

20196049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 20196049 is about 4494.0014463727. The cubic root of 20196049 is about 272.3258107377.

The spelling of 20196049 in words is "twenty million, one hundred ninety-six thousand, forty-nine".